<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>胖虎记事本</title>
    <link rel="stylesheet" href="css/index.css">
</head>
<body>
     <!-- 主体区域 -->
  <section id="todoapp">
    <!-- 输入框 -->
    <header class="header">
      <h1>胖虎记事本</h1>
      <input v-model="inputValue" @keyup.enter="add" class="new-todo" />
    </header>
    <!-- 列表区域 -->
    <section class="main">
      <ul class="todo-list">
        <li class="todo" v-for="(item,index) in list">
          <div class="view">
            <span class="index">{{index+1}}.</span>
            <label>{{item}}</label>
            <button class="destroy" @click="remove(index)"></button>
          </div>
        </li>
      </ul>
    </section>
    <!-- 统计和清空 -->
    <footer class="footer" >
      <span class="todo-count" v-if="list.length != 0">
        <strong>{{list.length}}</strong> items left
      </span>
      <button class="clear-completed" @click="clear" v-show="list.length != 0">
        Clear
      </button>
    </footer>
  </section>
  <!-- 底部 -->
  <footer class="info">
    <p>
      <a href="http://www.itheima.com/"><img src="./img/black.png" alt="" /></a>
    </p>
  </footer>
    <!-- 开发环境版本，包含了有帮助的命令行警告 -->
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <script>
        var app = new Vue({
            el:"#todoapp",
            data:{
                list:["好好学习","天天向上","强身健体"],
                inputValue:"写代码"
            },
            methods:{
                add:function(){
                    this.list.push(this.inputValue);
                    this.inputValue = ''                   
                   
                },
                remove:function(index){
                    console.log("删除");
                    console.log(index);
                    this.list.splice(index,1);
                },
                clear:function(){
                    this.list=[];
                }
            }
        })
    </script>
</body>
</html>